So now I have a boat with a toilet and waste tank but the lake I boat on doesn’t have facilities to pump the system out. Where do you go to pump your sewage when there is no marinas around?
Tow your boat to a facility that has one, or get a pump and tank to do it yourself, don't use the builtin toilet, switch to a portable toilet you can take to a dumping station. Thats all I got !!